Hydrodynamic loading profiles of viscously-interacting blocks subject to different stimulus locations

The conventional atomic force microscope (AFM) comprises a single cantilever with piezoelectric base excitation and optical read-out. The micro-electromechanical system is raster scanned over a sample surface to generate topographic measures as well as information on selected material properties. Fo...

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Bibliographic Details
Published in:Journal of the Royal Society of New Zealand 2021-04, Vol.51 (2), p.346-360
Main Authors: Manickavasagam, Arun K., Gutschmidt, Stefanie, Sellier, Mathieu
Format: Article
Language:English
Subjects:
Actuation
Arrays
Atomic force microscopy
Biological activity
Boundary integral method
Cantilevers
collective fluid dynamics
Fluid dynamics
Fluid flow
Fluid-structure interaction
Hydrodynamic loading
Hydrodynamics
Incompressible flow
Information processing
interactive fluid coupling
Material properties
Measurement
Microelectromechanical systems
Microscopes
non-neighbouring members
Parallel processing
Piezoelectricity
Raster scanning
Reynolds number
Stokes flow
Two dimensional flow
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Summary:The conventional atomic force microscope (AFM) comprises a single cantilever with piezoelectric base excitation and optical read-out. The micro-electromechanical system is raster scanned over a sample surface to generate topographic measures as well as information on selected material properties. For some large sample surfaces and biological processes, a single cantilever scan may render insufficient scan speeds. We therefore consider developing small-size AFM array technology to improve scan rates by parallel processing scanned information. As a first step we investigate the collective and interactive fluid dynamics between members in an array away from any sample surface. Our analysis is based on Stokes equation for incompressible flow and the two-dimensional boundary integral method. We first formulate the generalized equations and then focus on three- and five-beam configurations. The fluid dynamic behaviour of these small-size arrays are investigated for different gaps between members, Reynolds numbers and actuation modes. Special emphasis is laid on the effect of non-neighbouring members, which often, if not always, has been neglected in the existing literature. One of our findings reveals a Reynolds number dependent concave/convex hydrodynamic loading profile across the array that is introduced by non-neighbouring members in the array.
ISSN:0303-6758
1175-8899
1175-8899
DOI:10.1080/03036758.2020.1857802